GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/kvm_mkdb/testdb.c Lines: 0 17 0.0 %
Date: 2017-11-13 Branches: 0 12 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: testdb.c,v 1.9 2015/01/16 06:40:17 deraadt Exp $	*/
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/*-
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 * Copyright (c) 1992, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <db.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <paths.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "extern.h"
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/* Return true if the db file is valid, else false */
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int
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testdb(char *dbname)
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{
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	DBT rec;
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	DB *db = NULL;
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	size_t kversionlen;
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	char kversion[LINE_MAX];
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	int mib[2], ret = 0;
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	/* Read version string of running kernel */
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	mib[0] = CTL_KERN;
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	mib[1] = KERN_VERSION;
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	kversionlen = sizeof(kversion);
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	if (sysctl(mib, 2, kversion, &kversionlen, NULL, 0) < 0)
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		goto close;
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	/* Read the version out of the database */
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	if ((db = dbopen(dbname, O_RDONLY, 0, DB_HASH, NULL)) == NULL)
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		goto close;
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	rec.data = VRS_KEY;
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	rec.size = sizeof(VRS_KEY) - 1;
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	if ((db->get)(db, &rec, &rec, 0))
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		goto close;
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	if (rec.data == NULL || rec.size > kversionlen)
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		goto close;
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	/* If they match, we win */
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	ret = memcmp(kversion, rec.data, rec.size) == 0;
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close:
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	if (db)
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		(void)(db->close)(db);
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	return (ret);
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}